Malicious PDF — malware analysis report

Static analysis result for SHA-256 a61712359567116e…

MALICIOUS

PDF

77.7 KB Created: 2021-04-16 20:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c6279953f128cc423646a760c0aed4f3 SHA-1: 4a518edfffaf932e6148197b9d997c9ca54f16f9 SHA-256: a61712359567116ec49a252cab69e2821c86f61d9ad8edb419e0d481d7e7691a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, with a primary focus on a URL that appears to be a search result lure. The presence of multiple disposable domains and link farm characteristics further suggests malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://soxebez.ru/strik?utm_term=briggs+and+stratton+500+series+158cc+carburetor+adjustment PDF link annotation
    • http://nitiwomifigurod.mygamesonline.org/karagaminoxibogagewit.pdfIn PDF document text
    • http://xitawefavam.medianewsonline.com/bezupamurimitinewotuxab.pdfIn PDF document text
    • http://mopowataxix.medianewsonline.com/causas_de_angina_de_pecho.pdfIn PDF document text
    • http://biwiroxefamir.mywebcommunity.org/how_to_avoid_using_the_word_very.pdfIn PDF document text
    • http://futajef.medianewsonline.com/wavovorivumobidebajigo.pdfIn PDF document text
    • http://kedepoba.sportsontheweb.net/38270002631.pdfIn PDF document text
    • http://ribupisid.22web.org/zazotamafuxe.pdfIn PDF document text
    • http://vizemezezu.sportsontheweb.net/8101182206.pdfIn PDF document text
    • http://fagumawegoleleb.mypressonline.com/brucellosis_in_goats.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/taturi/tisugebiwitugujibokugurab.pdfIn PDF document text
    • https://03df74f7-894d-4c84-999e-da2b33eb06f5.filesusr.com/ugd/4c7733_17f188039cc548f698fea897f86b6b3d.pdf?index=trueIn PDF document text
    • http://zagofij.onlinewebshop.net/york_diamond_80_furnace_no_heat.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/91150420033.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/38514693761.pdfIn PDF document text
    • http://gemovimuwopete.atwebpages.com/nunebitidonatufinufetev.pdfIn PDF document text
    • https://6998e30b-c911-4113-ab34-4c15204891c7.filesusr.com/ugd/429b25_8d96c4c9748d478fa025215c3462e6e2.pdf?index=trueIn PDF document text
    • https://16e729f2-8c5c-4787-b670-14aeba6c5e03.filesusr.com/ugd/ac55e2_da492efbc3c8426d8f2780fde1e2b5e7.pdf?index=trueIn PDF document text
    • http://dapizodipe.myartsonline.com/how_to_set_up_a_hotspot_on_my_iphone_6.pdfIn PDF document text
    • https://6cdb29d4-22ce-4aaf-9e51-562b59d50851.filesusr.com/ugd/1b20fb_883e632455954c93958121acae190224.pdf?index=trueIn PDF document text
    • http://diturasenupope.epizy.com/japanese_knotweed_identification_sheet.pdfIn PDF document text
    • http://negemabubitaso.rf.gd/5178714298.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/baburao_la_pakda_full_hd_movie.pdfIn PDF document text
    • https://ca6b24e6-01cd-4368-a310-1df05077a315.filesusr.com/ugd/11b39a_c637915d772643a08face80dbb93134c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/alien_shooter_game_for_windows_8.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF211 6004 bytes
SHA-256: 604d12340e28ffac7a2b235793013a73858f93a873babe53b4f91e9d4b4273f1
font_01_sfnt_off00010672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10672 10092 bytes
SHA-256: c8e9ce807579b0b7ccea7b1b75418bc882df7cd3795bc528ff84715d6567ec65

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